Booting from usb mac os x

Then the system will launch from that device every time.

How to create a bootable macOS High Sierra USB Install drive

Regardless of the operating system you are using, booting your machine from USB media does not need to be difficult. A general understanding how your system loads can provide the basics needed to understand what is going on when you use boot media.

It provides guidance that is specific to the iteration of OS X you are running i. Sierra, High Sierra, Yosemite, etc. Windows and Linux users might consider Acronis Disk Director 12 , which includes an intuitive Boot Media Builder that streamlines the process and offers tremendous flexibility for the type and kind of boot media you can create, including WinPE media.


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All rights reserved. Acronis Disk Director Learn more day free trial. Once the Startup Manager screen appears, release the Option key. The utility will look for any available drives that include bootable content.

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Using either the pointer or arrow keys on the keyboard, select the USB drive you wish to boot from. Once selected, either hit the Return key or double-click your selection. The machine will start to boot from the USB drive.


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Depending on the company that created your version of BIOS, a menu may appear. All of the available system devices will be displayed in order of their boot priority. You can reorder the devices here.

How to create a bootable macOS Catalina USB install drive [Video]

Make sure you take off any important documents. Right-click the TransMac software icon and Run as administrator. In the warning dialog box, click the Yes button. No kidding.

Step 2: Back up your Mac

It could take one or two hours to complete the process depending on your computer and other variables. Update September 23, This guide has been revised to make sure it includes the latest changes. See all Headlines. See all How To. See all Features.